Following his apprenticeship, Tourtellotte travelled westward, working on construction projects in Chicago, Kansas City, Albuquerque, and Pueblo, Colorado, before arriving in Boise in 1890, months after Idaho achieved statehood.
In 1903, he formed a partnership with German immigrant Charles F. Hummel (1857–1939), a university-trained architect who had previously worked for Tourtellotte's architecture and construction business.
"[5] "The community development hotels, a major accomplishment of Tourtellotte's little-documented Oregon years, were a direct reflection of [his persuasive business] skills.
Tourtellotte retained ten percent of the gross receipts from the Idaho operation in return for "getting out quantities of plates, booklets, etc.
The two offices, though maintaining a common name, joint advertising, and a periodic association on particular projects, were hencefoth functionally separate.
Tourtellotte was known for combining architectural motifs from disparate styles and eras, and the domed Idaho State Capitol is celebrated for its use of natural light.
Based on the Hampton Court Palace in England, the UI Administration Building is a campus icon and was added to the National Register of Historic Places in 1978, at age 69.